CS 163-01 Programming Assignment #2: Catalog

Due Wednesday, January 28, by 2 p.m.

• Do this work individually, not in teams.

This program does not need to take any command-line arguments, but it should repeatedly prompt the user for a command — a single letter suffices — and then do the commanded operation, as follows:

20. display items sorted by titles
16. display items sorted by prices
17. quit
18. read list of items from file -- need to get name of file from user
19. store list of items into file -- need to get name of file from user

• Represent DVDs as objects with attributes title, minutes, and cents.
• Represent books as objects with attributes title, authors, pages, and cents.
• DVD and Book should each be a subclass of a class say Item.
• The common attributes title and cents probably should be in Item.
  Then, class Item should have methods getTitle() and getPrice().
• Class Item should have an `abstract' method toString().  Classes DVD and Book should have implementations of this method.
• Use   String   as the return-type for getTitle() .
• As Java does with basic API classes, it'll probably be useful to include the class name in the String produced by toString().  One thing this will facilitate is reading the list of items from a file.
• Use an array to represent the list of items.  You may assume that the list will not contain more than 128 items.
• For the commands "t" and "p", really do sort the array.
• Do the usual error-checking when accessing files.
• Delete dynamically allocated objects when the program finishes using them.

For your submission, provide a printout of your code and a printout of a demonstrattion of your program. 

For a 'grade' better than a "B", use good style.  For even better grades, use good style and implement further operations such as enabling the user to add new items to the list, change prices, etc.